changed return type of dbd_select_db() to const char;fixed attrib type in _dbd_parse_datetime; renamed dbd_quote_chars() to dbd_escape_chars()
changed return type of dbd_select_db() to const char;fixed attrib type in _dbd_parse_datetime; renamed dbd_quote_chars() to dbd_escape_chars()

balabit/libdbi,balabit/libdbi,balabit/libdbi